package com.cll.netty.netty.tcp.protocoltcp;

import java.nio.charset.Charset;
import java.util.UUID;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

public class MyServerHandler extends SimpleChannelInboundHandler<MessageProtocol> {
    private int count;
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, MessageProtocol msg) throws Exception {
        // 接收到数据，并处理
        int len = msg.getLen();
        byte[] content = msg.getContent();
        System.out.println("服务器接收到信息如下");
        System.out.println("长度：" + len);
        System.out.println("内容：" + new String(content,Charset.forName("utf-8")));
        System.out.println("服务器接收到消息包数据：" + (++this.count));

        // 回复消息
        String responseContent = UUID.randomUUID().toString();
        int responseLen = responseContent.getBytes("UTF-8").length;
        byte[] responseContent2 = responseContent.getBytes("utf-8");
        // 构建一个协议包
        MessageProtocol messageProtocol = new MessageProtocol();
        messageProtocol.setLen(responseLen);
        messageProtocol.setContent(responseContent2);

        ctx.writeAndFlush(messageProtocol);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        System.out.println("---抛出异常");
        ctx.close();
    }
}
